Galactic chemical evolution - Abundance gradients of individual elements

Astronomy and Astrophysics – Astronomy

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

307

Abundance, Chemical Evolution, Galactic Evolution, Milky Way Galaxy, Astronomical Models, Chemical Composition, Gas Composition, Nuclear Fusion, Solar Neighborhood, Star Formation Rate

Scientific paper

Models for chemical evolution of the Galaxy are presented, where the most recent ideas on stellar nucleosynthesis and supernova (SN) progenitors are taken into account. It is assumed that the disk forms by accretion of primordial material coming from outside with a time-scale which is a function of the galactocentric distance. The possibility of forming the disk out of enriched halo gas is also studied in a simple way. The evolution of the abundances of several single elements is predicted as well as that of gas mass, SN rates and star formation rate, both in the solar neighborhood and in the whole disk, under different assumptions for the star formation rate. Abundance gradients along the galactic disk are well reproduced and a possible interpretation for the differences among gradients of different elements is given in terms of nucleosynthesis and stellar lifetimes. This interpretation can represent a key for understanding gradients also in external galaxies. In particular, a natural explanation is suggested for the positive gradient of S/O, found in M101 and M33.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Galactic chemical evolution - Abundance gradients of individual elements does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Galactic chemical evolution - Abundance gradients of individual elements, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Galactic chemical evolution - Abundance gradients of individual elements will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-1519506

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.